Friction factor for turbulent open channel flow covered by vegetation.

ABSTRACT: The need for operational models describing the friction factor f in streams remains undisputed given its utility across a plethora of hydrological and hydraulic applications concerned with shallow inertial flows. For small-scale roughness elements uniformly covering the wetted parameter of a wide channel, the Darcy-Weisbach f = 8(u_*/U_b)² is widely used at very high Reynolds numbers, where u_* is friction velocity related to the surface kinematic stress, U_b = Q/A is bulk velocity, Q is flow rate, and A is cross-sectional area orthogonal to the flow direction. In natural streams, the presence of vegetation introduces additional complications to quantifying f, the subject of the present work. Turbulent flow through vegetation are character

SUBMITTER: Wang WJ 

PROVIDER: S-EPMC6435652 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature